Danica Sue Patrick is the most successful woman in American Open Wheel Racing ever. She was not only the girlfriend of a NASCAR driver but had a very serious racing career as well. She won the 2008 Indy Japan 300, and is actually the only woman to have won an Indy Car series.
Danica dated NASCAR driver Ricky Stenhouse Jr. from 2012 to 2017. It must have given both of them a lot of support to date someone from the same sport. They spent a lot of time together at races cheering each other on.